Pulley



Dec. 29, 1931. J CHATTILLION 1,838,905

PULLEY Filed Aug. 30, 1928 I Ill/1111111057101 necessary strength and simplicity of construe- Patented Dec. 29, 1931 UNITED STATES PATENT OFFICE, 1'

AUGUST J. CIELATTILLION, or s'r. LOUIS, Missouri-I, Assrsivon'or orrn-narn'ro HARRY BUEHLER, .13., on em. LOUIS, MISSOURI rULLnY Application. filed August so, 1928.

together by suitable dowels. T he dowels, at

the same time, serve to secure the rim to the spider which is preferably formed of band steel. The fiber sheets are built up in such a way as to present the ends of the sheets to that surface which forms the face of the pulley, so as to obtain the benefit of the greater friction resulting therefrom.

The principal object of the invention is to provide a pulley with a fiber rim in combination with a steel spider so as to obtain the benefit of the fiber rim without unduly increasing the weight of the pulley, and, at the same time, to provide a pulley that has the tion. Further and other advantages, such as comparatively low cost of manufacture, will be better apparent from a detailed description of the invention in connection with the accompanying drawings in which Figure 1 is a side elevation of my improved pulley with parts broken away to show one of the hub members in section; Fig. 2 is a vertical transverse section taken on the line 22 of Fig. 1; Fig. 3 is a horizontal cross section taken on the line 3-3 of Fig. 1; Fig. 4: is a side elevation of a modified construction of pulley, wherein a disc or web replaces the spider; Fig. 5 is a-fragment of the pulley of which are Very greatly'compressed so as to form a homogeneous block. The pulley P is preferably made in sections S, S joined along I Seria No; 302,932.

the line 00. The rim 1 may be provided with a medial slot 2, extending. inwardly from the inner surface of the rim to a substantial depthpand a metallicring section 3 is then inserted in the slot 2 of each section. A plu rality of holesare bored through the pulley riml andaring 8 for thereception of dowel pins 4 which hold the laminations a together as well asthe ring 3 in place, virtually forming these members into an integral structure.

. Ofcourse, the laminations are also glued to oneanother prior to their being compressed.

Thepulley hub H comprises sections 5, 5,

each of which are bent into proper semi-cy lmdrical shape from a suitable steel plate,

and a series ofspokes 6 connect eachhub section 'w1th the corresponding rim section.

Each of:the spokes may be formed of oppo= sitely. disposed spoke members m, m, which membersare riveted at their outer ends to opposite sides of the ring 3-and have outwardly turned flanges m, m. at their inner ends,.which flanges are riveted-to a hllbjSGC- tion, 5. Along thegline' a; on which the sec-' tionsS, Sgare joined, apair ofcomple'mentary loop members 7 T and 8 are afiixed to the ring se'ctions3,;3, the members? beingprovided with: anoutwardly,projecting lug 9 adapted'to enter. a recess lOformed in the member 8. A bolt 11 is then passed through the loop members 7 and 8 and a nut screwed on the projecting end of the' bolt for the purpose of securely fastening the sections to gether. The purpose of the interlocking formations 9 and 10 is to prevent the displacement of one section relative to the other with its resulting irregularity of pulley surface. The pulleys are, of course, locked together in the manner just described at opposite points as shown in the drawings.

It is also necessary to secure the hub sections together, and suitable brackets 13, 13 are provided for this purpose. The brackets .are'identical and each of them are provided tions 14: connected by a circular portion 15,

the latterbeing concentric with the hub sec.- tion. In order to give the brackets rigidity they'are U-shaped in cross section as shown in Fig. 3. Each bracket 13 is secured by a short pin 16 to a cylindrical member 17 between which and the bracket is a spacer 17'. The member 17 in turn is riveted to the adjacent hub section 5. After having mounted a pulley on a shaft (not shown) the hub sections are tightly clamped together by the means of bolts 18 passed through the brackets 13 which are drawn tightly together by ut 19 s r ed o r h b s .T le sof the braclie't's 13 is such that tlreyj i-ll stand considerable pressure Without Becoming distorted. a

In order to finish the side faces f, fof the pulley a metallic ring 20 mey b e placed on each side of the fiber laminations a, said rings being held in place by large head screws 21 (as shown in Fig. 3*) or anyequivelent device. A c s or In the manufacture ofcomparatively small pulleys the hub and rim may be connected by a disc or web 22 as shown in Fig. 4'. This may be formed either in sections or integral as desired.

In applying the invention to pulleys having exceptionally wide faces a series o'f'spo'kes 23 will be employed soas tosnpport the ulley throughout the entire width of the ace, and these spokes will preferably lie in "differentplanes, or will alternateeis shown in Figsib and 6. I l

Having described my invention, 'I claim:

A pulley comprising a pair of complementary sections, each section comprising rim andhub elements, and spokes connecting said elements, said rim elements including fiber laminations and 'a. metallic ring embedded therein, each spOkecomprising'a pair oiisp'oke members, the members of each pair being connected to opposite sides'of said ring and diverging toward the hub, means forconnecting 'tl1'e pulley sections at the rim, and means for connecting'the' sectionsatthe hub, th last mentioned means bein flied tothe hub elements betweenjthe s 'okeme'mbers;

In testimony whereof I ereunto aflik signature.

AUGUST J. OHATTITJLLION. 

